the manner of one person fucking another persons mouth.. usaully, it's the man who sticks his penis into either another man or woman's mouth.. but sometimes it's a woman who slaps a strap-on onto herslef and sticks it into someone's mouth.. (see strap-on)

Flirting with some one over facebook chat. Like sexting only a far less personal version where knowing the person isn't even necessary. Could be done frequently with one or multiple partners. Very common among males who met the girl the night before and didn't pull a number and instead resort to this virtual form of "spitting game."

"I've been facefucking this girl for like two weeks, we're finally going to the same party tonight hopefully I'll get lucky"

"Amber has been facefucking me all semester and still has no idea I'm not down.

1) Driving one's penis deep into a mouth.
2) Kissing so hard and intensely that it can no longer be called "kissing" and needs this term to best describe the act. An act which is amazing done, and disgusting to watch.

1) "Her pussy was so dry and covered with weird pussy bumps so I face fucked her instead. Good thing I'm on penicillin."

2) "We went to Denny's after the bar and this guy was face fucking his boyfriend in the corner booth. I was so appalled that instead of rushing to the can to puke I hurled on the two of them."